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Liskov Substitution Principle

Violating the 7 rules of the Liskov Substitution Principle (L in SOLID) leads to code that is difficult to reason about. The 3 type rules can be checked by compilers but the 4 behavioral rules have to be respected by us developers. 💚 BUY MY BOOK: https://leanpub.com/the-object-orient... ⭐️ More about LSP in Clean Architecture (Chapter 9): https://geni.us/IBhtLnh Watch First:    • Covariance and Contravariance   📄 The paper: https://dl.acm.org/doi/pdf/10.1145/19... 🏛️ Design By Contract: https://en.wikipedia.org/wiki/Design_... CONTENTS 00:00 Intro 01:33 Formal Definition 02:56 Robustness Principle 06:09 Type Rules 08:50 Terminology 11:59 Behavioral rules 19:15 Conclusion